Introduce young scientists to the basics of pulleys. Through charming illustrations and simple, easy-to-follow text, this nonfiction book introduces pre-readers to the benefits of these engineering marvels, providing everyday examples of a flagpole, a crane, an elevator, and window blinds. Award-winning author Michael Dahl delivers fun, fact-filled text for an engaging read-aloud or beginning read-alone. Includes hands-on experiments!